Premium
Effect of Yolk Sac Absorption on the Swimming Ability of Fall Chinook Salmon
Author(s) -
Thomas Allan E.,
Banks Joe L.,
Greenland Donald C.
Publication year - 1969
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1969)98[406:eoysao]2.0.co;2
Subject(s) - chinook wind , oncorhynchus , hatchery , yolk sac , zoology , fish <actinopterygii> , fishery , absorption of water , absorption (acoustics) , biology , environmental science , chemistry , materials science , embryo , botany , composite material
Tests were made of the swimming ability of fall chinook salmon (Oncorhynchus tshawytscha) during and after yolk sac absorption. Two sources of fish were used: hatchery fish incubated and reared in constant‐temperature well water and migrants from an incubation channel supplied with creek water of variable temperature. Two testing procedures were used: impingement tests using a fixed screen and constant water velocities with percent impinged as the measure, and stamina tests using increases in water velocities at fixed intervals with time of displacement as the measure. As the fish developed, a period of reduced swimming ability occurred shortly before complete yolk sac absorption. The slump coincided with the period of peak migration from the channel and may be a cause of migration and an important factor in survival.